I very much like to find a Trapezoidal and a Simpson's Rule program that works with the TI-86 as well as Etremma, The one that I down loaded from the web at TI-86 Files did not work. I have a claculus class, and there will be two more exams before school end's this session. If there is such a program, plese tell me. Thank you Jim. www.scr@tstonramp.com